33results about How to "Improve magnetic permeability" patented technology

The invention discloses a FeCoNbW alloy target material and a hot isostatic pressing preparation method thereof, and belongs to the technical field of magnetic storage target material manufacturing. The method comprises the following steps: carrying out vacuum melting on Fe blocks, Co blocks and Nb blocks, and then carrying out gas atomization to obtain FeCoNb alloy powder; the FeCoNbW alloy target material is obtained by mixing the FeCoNbW alloy powder and W powder, and then sequentially carrying out sheathing, die filling, degassing, gradient hot isostatic pressing sintering and machining on the FeCoNbW alloy powder and the W powder. The W powder is added into the FeCoNb alloy powder to be combined into mixed powder of target components, the FeCoNb alloy powder forms metal alloy due to the components, demagnetization can be achieved, and the final magnetic permeability of the target material is improved. And then the target blank is sintered in a gradient hot isostatic pressing mode, the problems that components are not uniform, the target blank cracks during conventional plastic deformation and the magnetic permeability is low are solved, and the yield of the FeCoNbW alloy target is effectively increased.

The utility model provides a magnetizer, an electromagnetic coil and a reversing valve, in the magnetizer, a first assembly plate and a second assembly plate are oppositely arranged, a first magnetic conductive plate and a second magnetic conductive plate are oppositely arranged, and the included angle between the first magnetic conductive plate and the first assembly plate and the included angle between the first magnetic conductive plate and the second assembly plate are both obtuse angles. The included angle between the second magnetic conductive plate and the first assembly plate and the included angle between the second magnetic conductive plate and the second assembly plate are both obtuse angles. According to the scheme, the included angles between the first magnetic conductive plate and the first assembly plate and between the first magnetic conductive plate and the second assembly plate are set to be obtuse angles, and the included angles between the second magnetic conductive plate and the first assembly plate and between the second assembly plate are set to be obtuse angles, so that compared with the existing scheme adopting a right angle, the scheme can be better matched with the extension direction of a magnetic induction line of a coil body in a magnetizer; in addition, the gaps between the first magnetic conductive plate and the coil body and between the second magnetic conductive plate and the coil body can be increased, and therefore the heat dissipation effect is improved.

The invention provides a FeCo alloy / graphene foam composite material and preparation and application thereof, the FeCo alloy / graphene foam composite material comprises FeCo alloy particles and graphene foam, and the FeCo alloy particles are loaded on the surface of the graphene foam and embedded between sheet layers and pores of the graphene foam. Different graphene foam contents have great influence on the morphology structure, saturation magnetization intensity, electromagnetic parameters and the like of the product. Along with the increase of the content of the graphene foam, the loading area of the FeCo alloy is continuously increased, and the large-particle FeCo alloy loaded on the graphene sheet is continuously reduced. The saturation magnetization and the magnetic loss capability of the composite material are continuously reduced along with the increase of the content of the graphene foam, and the electrical loss capability is continuously improved.

The invention discloses an environment-friendly electron accelerator and an electron beam focusing device.The electron accelerator comprises a shell barrel, an insulating device, a base and an accelerating tube, the insulating device is arranged on the outer side of the accelerating tube, and the shell barrel is arranged on the outer side of the insulating device; the electron beam focusing device comprises an electromagnetic coil, the electromagnetic coil is fixed between the shell cylinder and the insulation device through a fixing piece, and the electromagnetic coil is electrically connected with the current adjusting circuit. A solid insulation structure is adopted, the pollution problem caused by gas insulation is solved, the design of the focusing coil is provided, electron beams can be effectively focused and restrained in the transmission process, the stability and the centrality of electron beams are improved, and the transmission efficiency is improved. The focusing coil is tightly and fixedly connected with the shell, so that the stability and the reliability of the focusing effect are ensured, and a good magnetic conduction function is achieved.

The invention discloses a FeCoNbW alloy target material and a hot-pressing preparation method thereof, and belongs to the technical field of magnetic storage target material manufacturing. The method comprises the following steps: carrying out vacuum melting on Fe blocks, Co blocks and Nb blocks, and then carrying out gas atomization to obtain FeCoNb alloy powder; the FeCoNbW alloy target material is obtained by mixing the FeCoNbW alloy powder and W powder, and then sequentially carrying out sheathing, die filling, degassing, hot pressed sintering and machining on the FeCoNbW alloy powder and the W powder. The W powder is added into the FeCoNb alloy powder to be combined into mixed powder of target components, the FeCoNb alloy powder forms metal alloy due to the components, demagnetization can be achieved, and the final magnetic permeability of the target material is improved. And then target blank sintering is conducted in a vacuum hot pressing sintering mode, the problems that components are not uniform, the target blank cracks during conventional plastic deformation and the magnetic permeability is low are solved, and the yield of the FeCoNbW alloy target is effectively increased.

The utility model discloses a deep-groove long-stroke loudspeaker T iron, which comprises a columnar core shaft, an annular substrate is fixed on the peripheral side of the bottom end of the columnar core shaft, and heat dissipation holes are formed in the annular substrate; a through hole is formed in the center of the columnar mandrel, an inward convex arc is arranged in the through hole, a third hole communicated with the through hole is formed in the upper end of the through hole, and an arc surface is connected between the inner wall of the lower end of the through hole and the bottom surface of the annular base plate; a first step ring is arranged on the outer wall of the columnar mandrel. The inner convex arc is beneficial to heat reflection and dissipation and facilitates heat dissipation, and the first step ring is arranged to reduce the gravity of the cylindrical core shaft under the condition that the cylindrical core shaft is long, so that the vibration stroke of the voice coil is increased, and the power of the loudspeaker is improved. The axes of the heat dissipation holes are parallel to the axis of the columnar mandrel. The heat dissipation holes comprise first holes and second holes, and the first holes and the second holes are different in diameter so that the inner walls of the heat dissipation holes can form a step shape. The step-shaped heat dissipation holes facilitate heat dissipation.

The invention discloses a sound production unit, which comprises a basin stand, a magnetic circuit assembly, an inner voice coil, an outer voice coil, a diaphragm assembly and a centering disk, and is characterized in that the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and a central magnetic structure and an edge magnetic structure which are respectively arranged on the yoke; the central magnetic structure comprises lower central magnetic steel, a central washer, upper central magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top, the upper magnetic conductive cover comprises a body and a surrounding wall arranged along the edge of the body, and a first gap is formed between the surrounding wall and the upper central magnetic structure; the yoke is provided with a plurality of bosses, the plurality of bosses are arranged around the lower center magnetic steel, a second gap is formed between the bosses and the lower center magnetic steel, and the first gap and the second gap are communicated to form an inner side magnetic gap; the edge magnetic structure is arranged on the outer side of the boss, and an outer side magnetic gap is formed between the edge magnetic structure and the boss; the vibrating diaphragm assembly is connected with the basin frame, the upper magnetic conductive cover and the outer voice coil; the centering disk is connected with the inner voice coil, the outer voice coil and the frame. The sounding unit is novel in structure, thin in thickness and high in performance.

The invention relates to a spliced outer rotor stator and a motor, the spliced outer rotor stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth, and the stator teeth are made of oriented silicon steel sheets. The stator yoke is connected with a plurality of installation blocks, insertion grooves are formed in the installation blocks, the installation blocks and the stator yoke are integrally formed and form a stator frame, insertion blocks are installed in the insertion grooves, and the insertion blocks and the installation blocks jointly form stator teeth. The stator frame is formed by winding and laminating non-oriented silicon steel sheets, the insertion blocks are formed by laminating oriented silicon steel sheets, and the insertion blocks are fixed in the insertion grooves in an interference mode. Compared with the prior art, the stator teeth are made of the oriented silicon steel sheets, so that the saturation phenomenon of the flux density of the stator teeth is solved, the magnetic conductivity is enhanced, the iron loss is reduced, and the efficiency of the motor is improved; and the magnetic line direction of the stator is consistent with the rolling direction of the oriented silicon steel sheet, so that the saturation working point of the motor is higher, the magnetomotive force of the motor is larger, and the torque density of the motor in unit volume is improved.

The present invention discloses a non-oriented silicon steel with high magnetic conductivity and a manufacturing method thereof, and belongs to the field of metallurgical technology. The chemical composition of the non-oriented silicon steel is required to include, by weight percentage: C≤0.0025%, Si: 0.5%~1.5%, Mn: 0.10%~0.30%, 0.30%≤Als≤1.0%, P: ≤0.05%, Sb: 0.04%~0.10%, S≤0.0040%, N≤0.0015%, Ti≤0.0020%, and the rest is Fe and unavoidable impurities. The non-oriented silicon steel is subjected to normalization treatment, and the magnetic permeability of the product is obtained through reasonable composition, process and texture control. 1.5 / 50 and μ 1.5 / 60 All above 2000Gs / Oe, and the finished product iron loss P 1.5 / 50 ≤3.5W / kg, P 1.5 / 60 ≤4.5W / kg.

The transformer framework comprises a winding frame, limiting blocks are fixedly connected to the two sides of the winding frame respectively, embedding grooves are formed in the upper face and the lower face of the winding frame respectively, expansion assemblies are clamped in the embedding grooves in a matched mode, triangular clamping pieces are fixedly installed on the two sides of the winding frame respectively, and the triangular clamping pieces are connected with the limiting blocks in a matched mode. One side of the winding frame is connected with a connecting piece A in a clamped mode, and the other side of the winding frame is connected with a connecting piece B in a clamped mode. According to the transformer framework convenient to wind the coil, the splicing pieces at the two ends of the expansion assembly are inserted into the interiors of the embedding grooves correspondingly, then when the coil is wound, the wound coil is expanded through the elastic effect of the stainless steel elastic pieces, copper wires are convenient to wind, the filling density and the arrangement compactness of the wound coil are improved, and the winding efficiency of the coil is improved. Therefore, the eddy-current loss of the transformer in use is reduced, the magnetic conductivity of the transformer is improved, meanwhile, the surface area of the coil can be increased due to the fact that the winding is compact, and more effective heat dissipation is facilitated.

The invention belongs to the technical field of long-strip-shaped ferromagnetic component nondestructive testing, and particularly discloses a long-strip-shaped ferromagnetic component nondestructive testing magnetizing device which comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected through an elastic stopping piece; semicircular magnetization units are mounted in the upper shell and the lower shell through elastic connecting pieces; each semicircular magnetization unit comprises three arc-shaped plates, two middle partition plates and two side plates, the three arc-shaped plates are sequentially attached to form a magnetic outer ring, the two side plates are fixed to the two ends of the magnetic outer ring, the two middle partition plates are arranged on the inner side of the magnetic outer ring, and mounting cavities are formed between the middle partition plates and the side plates; a plurality of arc-shaped magnetic blocks are installed in the installation cavity, an elastic cushion piece is arranged between every two adjacent arc-shaped magnetic blocks, and a magnetic cover plate is fixed to an opening of the installation cavity. The nondestructive testing magnetizing device for the long-strip-shaped ferromagnetic component has the advantages of being low in cost, high in magnetizing performance and convenient to disassemble and assemble.

This invention discloses a device and method for measuring the magnetization intensity of irregularly shaped permanent magnets in motor applications. The bottom of the measuring device is configured as a workbench, on which an L-shaped placement platform is inclinedly arranged. A lifting component is slidably connected to the inner side of the long side of the L-shaped placement platform. A magnetically conductive clamping iron core is clamped onto the lifting component, and a measuring coil is wound on the magnetically conductive clamping iron core. The magnetically conductive clamping iron core also has a clamping gap for the irregularly shaped permanent magnet, and the clamping gap for the irregularly shaped permanent magnet is arranged opposite to the measuring coil. During measurement, the irregularly shaped permanent magnet can be clamped by the magnetically conductive clamping iron core, and then the lifting component drives the magnetically conductive clamping iron core to slide on the long side of the L-shaped placement platform, thereby achieving rapid positioning and directional cutting of the magnetic circuit, and thus accurately measuring the magnetic flux of the iron core. The magnetization intensity of the permanent magnet can be calculated, and this magnetization intensity can be used for magnetic circuit calculation of permanent magnets in motor applications, thereby achieving accurate measurement of the magnetization intensity of irregularly shaped permanent magnets.

The invention relates to an anti-radiation electronic protective film, and belongs to the field of preparation of electronic protective films. The electronic protective film comprises a double-sided adhesive tape and a soft magnetic radiation-proof layer on the double-sided adhesive tape, the soft magnetic anti-radiation layer is obtained by curing a soft magnetic anti-radiation coating; the soft magnetic anti-radiation coating comprises the following raw materials in parts by mass: 90-100 parts of epoxy resin, 35-70 parts of a solvent, 60-110 parts of a curing agent, 2-4 parts of a flame retardant and 3-6 parts of soft magnetic anti-radiation powder. The prepared electronic protective film is moderate in production cost, beneficial to industrial production, suitable for a high-frequency electromagnetic range and good in magnetic permeability and electromagnetic shielding effect.

The invention relates to a rotor core structure of a permanent magnet synchronous motor, and relates to the technical field of permanent magnet synchronous motors, the rotor core structure of the permanent magnet synchronous motor comprises a magnet yoke piece, a connecting piece, a magnetic steel groove and a magnet yoke hole, the connecting piece is connected with the magnet yoke piece through a connecting assembly, and the connecting assembly comprises a connecting column, the magnet yoke is coaxially arranged on the connecting piece and is inserted into the magnet yoke hole for positioning; and the plurality of connecting screws penetrate through the magnet yoke piece and are in threaded connection with the connecting piece. The magnetic conductive material on the magnetic yoke piece is removed through the magnetic yoke hole, and the connecting piece and the connecting column are made of the non-magnetic conductive metal material, so that the magnetic leakage phenomenon of the bottom of the magnetic steel groove is greatly reduced, meanwhile, the connecting piece and the magnetic yoke piece are connected through the connecting column and the connecting screw, the connecting column, the connecting piece and the magnetic yoke piece are separately produced, and the production efficiency is improved. And the connecting screws are purchasable parts, and the production cost is reduced, so that the motor quality and the production efficiency are simultaneously improved, and the production cost is reduced.

The present invention relates to the technical field of low-voltage electrical equipment, and in particular to a magnetic-proof slot structure of a current transformer and a manufacturing method thereof, comprising: a shell, an iron core, a winding and a magnetic-shielding ring, wherein a circular hole is respectively opened at both ends of the shell, a tube body is inserted into the circular hole, an iron core is mounted on the tube body, a winding is arranged on the iron core, an output end of the winding passes through the end surface outside the shell, and a magnetic-shielding ring is mounted on the iron core. By mounting the magnetic-shielding ring on the iron core, when measuring a cable to be measured, the magnetic conductivity of the iron core for the cable to be measured can be improved, and the magnetic field outside the device can be shielded, so that the current in the winding is stably output to the ammeter, thereby increasing the accuracy of the ammeter in measuring the cable to be measured.

The utility model discloses a wear-resistant motor for adjusting a variable valve lift of an engine, which belongs to the technical field of motors and comprises a casing, a stator fixed in the casing, a rotor arranged in a middle cavity of the stator, a through hole arranged in the rotor and penetrating through two ends of the rotor, and a rotating shaft fixed in the through hole. The motor is characterized in that one end of the rotating shaft is provided with a first extending section extending out of the shell, worm teeth are arranged on the first extending section, and a hard layer is arranged on the worm teeth. According to the motor, one end of the rotating shaft is provided with the first extension section extending out of the casing, and the worm teeth are arranged on the first extension section, so that the first extension section of the rotating shaft forms the worm, the rotating shaft and the worm are integrated, and the transmission reliability of the worm is enhanced; and meanwhile, the worm teeth are provided with the hard layers, so that the wear resistance of the worm teeth is enhanced, transmission errors caused by wear are reduced, and the precision of valve lift adjustment is improved.

The invention discloses steel for a 3C product shell and a manufacturing method of the steel, belongs to the technical field of steel, and solves the problems that the comprehensive performance of the steel is ensured to meet the application requirements and the use performance of the steel is prevented from being influenced due to increase of brittleness through fine material design and processing technology control while the magnetic conductivity of the steel is improved. Comprising the following formula: less than 0.008% of C, less than 0.03% of Si, less than 0.3% of Mn, 0.015-0.1% of T , 0.01-0.08% of A < l > and the balance of Fe, and also possibly contains trace unavoidable impurities. The steel strip is annealed at low temperature under high pressure, when a steel coil is annealed at high pressure, the grain recovery potential energy is large, the grains can grow up rapidly, the magnetic conductivity of the product is ensured by the large grains, the surface hardness of the product is ensured by low-temperature annealing and large smooth extension, and the product is ensured to be free of timeliness and high in magnetic conductivity after the steel strip with the formula is rolled and annealed. Meanwhile, the product hardness, the stamping performance and the surface electroplating effect are considered.

The invention provides a regenerated nickel-platinum alloy target material and a preparation method thereof. The preparation method comprises the following steps: (1) pre-treating a nickel-platinum alloy residual target; (2) the pretreated nickel-platinum alloy residual target is subjected to suspension smelting, and a nickel-platinum alloy cast ingot is obtained after cooling; and (3) sequentially carrying out plastic processing, homogenizing annealing, hot rolling and recrystallization annealing on the nickel-platinum alloy cast ingot to obtain the regenerated nickel-platinum alloy target material. According to the method, a physical method is adopted, the nickel-platinum alloy residual target is prepared into the high-purity target material meeting the sputtering use requirement again under the condition that the basic components of the material are not changed, the process is simple, the production efficiency is high, rapid turnover of the material is facilitated, a large amount of acid does not need to be used, and the method is convenient to popularize in actual production.

The normally closed solenoid valve disclosed in the present invention includes a valve body and an electromagnetic switch structure. The valve body is provided with a first fluid channel and a second fluid channel connected through a valve port. The electromagnetic switch structure includes a skeleton wound with a winding, a magnetic conductor, a static iron core and a moving iron core. The skeleton is provided with an intermediate channel. A first ring sleeve is provided at the bottom of the skeleton. The first ring sleeve and the intermediate channel form a first step, and the first step includes a first abutting portion; the static iron core is fixedly arranged at the relatively upper end of the intermediate channel, and the moving iron core is movably arranged at the relatively lower end of the intermediate channel; a second step is provided on the bottom side of the moving iron core, and the second step includes a second abutting portion. A spring is provided on the outer sleeve of the lower end portion of the moving iron core, and the two ends of the spring abut against the first abutting portion and the second abutting portion respectively; an upper limit abutting portion corresponding to the first abutting portion or the bottom end of the first ring sleeve is provided on the side of the moving iron core. When the upper limit abutting portion abuts against the first abutting portion or the bottom end of the first ring sleeve, there is a spacing between the moving iron core and the static iron core.

The invention discloses a sound production unit, which comprises a basin stand, a magnetic circuit assembly, an inner voice coil, an outer voice coil, a diaphragm assembly and a centering support chip, and is characterized in that the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and a central magnetic structure, a concave magnetic structure and an edge magnetic structure which are respectively arranged on the yoke; the center magnetic structure comprises lower center magnetic steel, a center washer, upper center magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top. The upper magnetic conductive cover comprises a body and a surrounding wall arranged along the edge of the body. The number of the concave magnetic structures is two, the two concave magnetic structures are symmetrically arranged on the two sides of the enclosure bulkhead, a passing opening is formed between the two concave magnetic structures, and an avoiding notch communicated with the passing opening is formed in the bottom end of the enclosure bulkhead. The edge magnetic structure is positioned on the outer side of the concave magnetic structure; the vibrating diaphragm assembly is connected with the basin frame, the upper magnetic conductive cover and the outer voice coil; the centring disk comprises inner installation parts which are connected in sequence, and the inner installation parts are connected with the outer voice coil and the inner voice coil. The sounding unit is novel in structure, thin in thickness and high in performance.

The utility model discloses an impedance balance compensation high-precision current transformer. Comprising a fixed plate, a semi-circular fixed lower shell with a cavity, a semi-circular detachable upper shell with a cavity, a fixed iron core and a detachable iron core, wherein the semi-circular fixed lower shell with the cavity is fixedly connected to the fixed plate, the semi-circular detachable upper shell with the cavity is mounted above the fixed lower shell, and the fixed iron core and the detachable iron core are fixedly mounted in the fixed lower shell and the detachable upper shell respectively. And the opposite ends of the fixed iron core and the detachable iron core are close and attached to form a complete circular ring structure. The detachable fixed lower shell and the detachable upper shell are arranged, installation can be completed without breaking a high-voltage wire of a main coil during use, wiring is convenient, meanwhile, the opposite ends of the fixed lower shell and the detachable upper shell are open, and the fixed iron core and the detachable iron core in the fixed lower shell and the detachable upper shell can be spliced without shielding. Therefore, the purposes of greatly reducing magnetic leakage and improving the magnetic conduction effect are achieved, the directly generated current error is reduced, and the precision is improved.

The electromagnetic coil comprises a clamping cover, a magnetizer, a coil body and a clamping spring, the clamping cover is made of magnetic conductive materials, the clamping cover is fixedly connected with the magnetizer, the coil body is provided with an installation hole, the magnetizer is provided with a magnetizer hole, and the clamping spring is arranged in the magnetizer hole. The installation hole and the magnetizer hole are oppositely arranged, one of the clamping cover and the magnetizer comprises a containing groove, the clamping spring is arranged in the containing groove, and the projection plane part of the clamping spring is located in the projection plane area of the magnetizer hole in the longitudinal direction of the coil body. The clamping cover, the magnetizer and the coil body are fixed through a packaging body, and the valve body is matched with the coil in a clamping mode. The electromagnetic coil clamping cover is made of the magnetic conductive material, leakage magnetic flux is reduced, coil attraction is improved, coil heating is reduced, and product reliability is improved.

The invention discloses a motor stator structure with spliced iron cores and a processing method thereof, the motor stator structure comprises a stator outer iron core, a stator inner iron core and a stator embedded iron core, and the stator embedded iron core is embedded into the stator outer iron core. The stator structure adopts a structural form of the stator outer iron core, the stator inner iron core and the stator embedded iron core, and the stator outer iron core, the stator inner iron core and the stator embedded iron core are respectively formed through a special processing method, so that the motor stator structure has the effects of low loss, high efficiency and low cost.

The utility model discloses a miniature loudspeaker and an assembling jig, the miniature loudspeaker comprises a support, a voice coil and a diaphragm, the support is a support with two open ends, the support comprises a first ring wall and a second ring wall, and the first ring wall and the second ring wall form an accommodating cavity; a magnetic circuit assembly is further installed in the containing cavity and comprises an inner ring magnetic circuit, an outer ring magnetic circuit and a magnetic conductive plate. The inner side wall of the accommodating cavity is also provided with a limiting step; according to the loudspeaker, the total height size of the loudspeaker can be reduced, and the outer ring magnetic circuit is limited by utilizing the limiting step on the bracket, so that the risk that the outer ring magnetic circuit falls off due to long-term violent vibration or strong impact force is prevented.

The invention discloses an iron-cobalt alloy target material and a preparation method and application thereof, and belongs to the technical field of material processing. The invention provides a preparation method of an iron-cobalt alloy target material. The preparation method comprises the following steps: preheating an iron-cobalt alloy ingot, forging, preheating after forging, rolling, annealing, rolling and annealing in sequence, and finally flattening and machining. Meanwhile, the deformation rate of forging and rolling and the temperature and time of annealing treatment are controlled, and therefore the iron-cobalt alloy target material which is fine and uniform in crystal grain, high in purity and high in magnetic permeability can be effectively obtained. In addition, the preparation method of the iron-cobalt alloy target material is simple in process, short in flow, easy to operate, high in operability and repeatability and high in yield.

The application relates to an amorphous stator core, a motor and a vehicle. The amorphous stator core comprises a plurality of silicon steel sheets and a plurality of amorphous sheets. The plurality of silicon steel sheets and the plurality of amorphous sheets are alternately stacked along the axial direction of the amorphous stator core. The silicon steel sheet comprises a protruding piece located at the outer edge of the silicon steel sheet and extending outward along the radial direction of the silicon steel sheet, and used for connecting the shell of the motor. The axial direction is perpendicular to the radial direction. The scheme can improve the overall strength and safety of the amorphous stator core, and reduce the maintenance frequency of the motor during use. At the same time, the scheme can ensure better insulation effect between the stacked amorphous sheets, thereby further reducing the eddy current loss of the amorphous stator core, and further reducing the energy loss of the core during operation. Furthermore, the scheme can further reduce the radial stress of the amorphous sheet, and reduce the eddy current loss of the amorphous stator core.

The present invention discloses a composite flat-bottomed aluminum pot, comprising an aluminum pot body and a magnetic conductive sheet embedded in the bottom of the aluminum pot body, the edge of the magnetic conductive sheet is covered and fixed in the bottom of the aluminum pot body, the upper end surface of the magnetic conductive sheet is arranged parallel to the outer bottom surface of the aluminum pot body, a positioning hole is arranged at the center of the magnetic conductive sheet, a plurality of oblong holes are arranged radially along the positioning hole toward the edge of the magnetic conductive sheet, waist-shaped holes are arranged circumferentially along the positioning hole toward the edge of the magnetic conductive sheet between adjacent oblong holes, the edges of the oblong holes and the waist-shaped holes are extended toward the outer bottom surface of the aluminum pot body to form steps, one end of the step close to the outer bottom surface of the aluminum pot body is flush with the outer bottom surface of the aluminum pot body, and a plurality of riveted through holes are arranged circumferentially along the positioning hole toward the edge of the magnetic conductive sheet. The present invention solves the problems of the prior art that the pot bottom has bulges, small contact area, poor thermal conductivity, and is not easy to clean.

The utility model relates to the technical field of voice coil gauges, and discloses an anti-floating voice coil gauge structure, which is used for installing a voice coil in a loudspeaker in an auxiliary manner and comprises a cylinder body, an accommodating space is arranged in the cylinder body, and a first positioning hole and a second positioning hole are respectively formed on two sides of the cylinder body in a penetrating manner; a magnetic conducting piece with a U-shaped cross section is arranged in the cylinder body; the two ends of the top of the magnetic conducting piece are inserted into the first positioning hole and the second positioning hole respectively; and when the voice coil is installed, a magnetic attraction force is generated between the magnetic conductive piece and an auxiliary magnet or a washer of the loudspeaker, so that the voice coil gauge is pressed on the auxiliary magnet or the washer, and the voice coil gauge is prevented from floating.

The utility model belongs to the technical field of chip removal machines, and particularly relates to a magnetic chip removal filtering device which comprises a scraper chip removal machine, a water tank and a magnetic roller. A scraper blade is arranged in the scraper blade chip removal machine, the scraper blade chip removal machine is arranged above the water tank, the magnetic roller is arranged in the water tank, the axis direction of the magnetic roller is parallel to the moving direction of the scraper blade in a horizontal section, and the scraper blade is in contact with the magnetic roller. According to the magnetic chip removal filtering device, the magnetic roller is adopted as a magnetic adsorption source, the scraper chip removal machine is installed above the magnetic roller in the length direction of the magnetic roller, and cuttings adsorbed by the magnetic roller are collected and conveyed through the scraper chip removal machine. The cuttings of the magnetic roller will be subjected to vacant backflow in the process of waiting for scraping and conveying of the scraping plate, coercing and entrainment of the cuttings liquid in the scraping process can be reduced, and the recycling rate of the cutting fluid is higher than that of a traditional scraping plate chip removing and filtering device.

The invention relates to a preparation method of a high-magnetic-permeability epoxy glass cloth laminated board, which comprises the following steps: adding epoxy resin, a curing agent and a solvent into a reaction kettle to react for 4-6 hours, cooling after the reaction is finished, and adding a catalyst to obtain an epoxy resin polymer; mixing a high-magnetic-conductivity material with an epoxy resin polymer to obtain a magnetic epoxy resin adhesive; injecting a magnetic epoxy resin adhesive into a slurry tank of a gluing machine, and dipping, coating and gluing the alkali-free glass cloth to obtain a magnetic epoxy gluing cloth; the magnetic epoxy upper adhesive tape is stacked and then placed into a pressing machine to be pressed and cured, and the high-magnetic-conductivity epoxy glass cloth laminated board is obtained; the high-magnetic-conductivity material comprises any one or a mixture of more of pure iron, a silicon steel sheet, an iron-aluminum alloy, a soft magnetic ferrite composite material and an iron-cobalt alloy. The method has the effect of improving the magnetic permeability of the glass cloth laminated board.